Distribution box for electric circuits



NW. 1s., 1924. 1,516,365

D. WELGE DISTRIBUTION BOX FORELECTRIC CIRCUITS Filed July 14, 1922 umlllliillll mllli Patented Nov. 1S, 1924.

ltll

PATENT OFFICE.

DXDRTK W'ELQE, OF IYASON. NEVADA.

DISTRIBUTN "BOX EUR ELECTRG CBCUITS.

Application filed July le,

To all whom t muy concern.'

Be it known that I, Drouin limiten, of Mason, in the State of Neruda, United States of America7 a subject of the King of Norway, and now holding i'irst papers of naturalization, issued Nov. 18, 1920, have invented certain new and useful lmprovements in Distribution Boxes for Electric CircuitsE of which the followirng` is specification.

lt is possible at the present time to secure very satisfactory standard equipment for the distribution of electric energy in circuits carrying heavy currents, but under some circumstances, and particularly in the case of some mining properties the high initial cost is prohibitive. Ordinary junction boxes are sometimes employed as a cheap substitute in which the wires are connected by taped joints, but it is a ditlicult and sometimes dangerous matter to connect up an extra circuit in suoli a box. My object therefore is to devise a distribution box which will be safe, cheap, simple and strong, in which all connections are visible when the cover is revmoved, and which permits of the connection of extra circuits with ease and safety.

I attain the object of my invention by means of the constructions hereinafter' described and illustrated in the accompanying` drawings in which- Fig. 1 is a front elevation, partly broken away, of my improved distribution box; and

Fig. 2 a cross section of the same from back to front.

In the drawings like numerals of reference indicate corresponding parts in the different figures.

l is a back of lireproof insulating material such as asbestos board. While this back may be supported in any suitable manner7 a preferred construct-ion for this purpose is illustrated in the drawings.

Two substantially parallel depending members are provided which may be secured to a wall or other support by means of bolts 3 as shown. The back is secured to the supporting members by means of bolts Ll, which also serve another purpose as will hereinafter' appear.

5 are plates of lireproof insulating material, which extend out from said back and are secured thereto by means of the bolts 1l. To enable the bolts to perform this function l provide each end of each plate with a. metal strap 6 bolted or riveted to the plate 1922. Seriell No. 5T/'5,669

and forming loops 'Y at each corner of each plate. Through these loops the bolts e pass and are set up by means of nut-s 8 behind the support-ing members 2 and nuts 9 out* side the outer straps ln the plates 5 are formed a plurality of apertures through which pass the ends of the bus bars l0, which preferably project at each end through the supporting plates. These bus bars are provided with a series of bolts l2 by means of which the terminals of the conductors may be secured to the bus bars. rlhe conductors are preferably led through conduits or armored cables let, which conduits are provided at their upper ends with bushings 15 to prevent chaling of the insulating` jackets of the conductors.

The conductors are supported in any suitable position relative to the distribution box by a. conduit supporting bar 16, which is bolted to the supporting members 2 below the back l and is provided with a series of holes 17 through which may pass the legs of U-bolts 18 adapted to clamp the conduits to the bar.

The number of bus bars employed will depend on the nature of the current being distributed. l show three bus bars such as would be employed for three-phase current.

The plates and bus bars are enclosed by a removable cover 19 which is held in position in the following manner. rllhe outer ends 20 of the bolts e are extended so that they may pass through holes formed in the outer end of the cover. Nuts 2l screwed on these ends serve to hold the cover securely in position against the back. The lower rear edge of the cover is notched as shown particularly in Fig. 2 so that the upper ends of the conduits ltmay extend within the cover.

llt will be found that a distribution box constructed as described possesses the strength and simplicity which are the most essential requirements for mill equipment. "With this box it is an easy mattei' to add extra circuits, as the bus bars are readily accessible and are provided with the necessary holes for such operations.

The amount of space occupied by the box is a minimum relative to the number of connections provided for. All terminals are visible from above, below or from the front1 and all terminals are bolted, which makes it a. simple matter to change or alter connections. l/Vith the cover on7 all live parts are entirely concealed.

what elaim as'iuy invention is:-

l. A distribution box 'for high tension em'- ifeiits comprising a back formed of a plate of liiepi'oof insulating material; bus bar supports comprising two plates of ii'eproo insulating n'iatvei'ial secured to and extending; out from said back; bus bars Carried by and nxteiioing between said plates and arranged in a series from back to front; and conduetois 'foi' supplying eleeti'ieal energy to said bus bars the eonflaetoi's being carried tlii'ouajli one Side oi the box? each bai.x being provided with a plurality of oi-enings for outlet connections.

2. distribution boi: eompi'isingj a back of fiiepioof insulating material; bus bar supports compiisiag two plates o' lii'epi'ooli' iinsuiltinzay iiiatei'ial; metal straps secured to said plates forming; loops adjacent eaeby Corner; bolts passing through said loops se curing the plates to the back; and bus bai-s eai'i'ied by and extending between said plates.

Signed at Mason, of June, 1922,

DUDRHQ lVCLGlfS.

lllitnesses 

